Autocoro最新技术: e-save

能源成本上涨速度高于纱线价格上涨速度,Autocoro纺纱厂每年的能耗成本约占每年营业额的5％,主要能耗是电能.     

Who wins when price information is more ubiquitous? An experiment to assess how infomediaries influence price

Internet retailers often make use of price search services (infomediaries) that have the effect of reducing consumer search and expanding seller market presence. Research on price and advertising suggests that this may not be a profitable strategy. We develop an experimental posted-offer market to estimate the impact of infomediaries on price of homogenous goods. We analyze panel data from a range of market conditions that address how infomediaries services affect both seller-level offered price as well as market-level transacted price. We find that, while sellers attempt to extract higher prices through a higher initial offer price when using an infomediary, they fail to successfully collect it; transacted prices remain largely unchanged. As a consequence the benefits of infomediaries fall primarily to the buyer who faces largely unchanged transacted prices, and substantially reduced search costs. Search costs are, in essence shifted to the seller. Sellers who participate in this sort of price comparison should be aware that they are following a high-volume/low profit per unit strategy.     

Analyses of (AD)-sorption for the estimation of pore-network dimensions and structure

The interpretation of pore dimensions based on physical ad-desorption analyses is central to the characterization of pore network structure. Several approaches have been proposed and are commonly employed in the analysis of physical adsorption and/or desorption to deduce the dimensions of the porous network. These approaches assume either theoretical (e.g., BET, the Halsey equation as interpreted by Pierce et al., or the more recent analyses of microporosity) or standard isotherms as model(s) for the sequential calculations required in estimating the pore network dimensions. Subsequent representation of the pore dimensions and the relationship between these distributions in dimension and other experimental parameters (such as catalytic activity, adsorptivity or transport); thus, depend explicitly on the model employed in the analyses. Each instrument currently available for the measurement of porous solid structure by sorption employs the same specific models for the relationship between the volume ad-desorbed and the dimensions of the porous network that is being characterized.This paper analyzes the interpretation of porous dimensions based on the sequential calculations required in the analyses. A new approach is proposed which is based on a modification to current practices reflecting Halsey's original theory for the thickness of the adsorbed layer (as a function of P/P ₀). Further, the calculations of the incremental changes in the exposed surface area are discussed as they relate to pore network structure. A method is proposed to infer the differences in pore shape. Sorption data are analyzed by these new approaches, and these analyses will be compared with those approaches currently employed. Analyses based on these modified approaches provide a dramatically more consistent interpretation of the sorption data and the corresponding pore network structures.     

胰腺癌经动脉灌注化疗指南（草案）

【摘要】 胰腺癌是恶性度最高的实体肿瘤之一。对不能手术切除的胰腺癌，经动脉灌注化疗由于肿瘤局部药物浓度较静脉用药高，可以达到更好的治疗效果，在改善疾病相关症状、延长生存期、减少肝转移及发生肝转移后的治疗上均取得了令人瞩目的成绩。本文在相关概念、禁忌证、适应证、术前准备、操作方法、术后处理及并发症的预防和处理等方面给出了较详尽的规范化建议，旨在帮助国内同行作出合理决策，但不是强制性标准，也不可能包括和解决胰腺癌经动脉灌注化疗中的所有问题。因此，在面对某一患者时，应在充分了解本病的最佳医学证据，结合患者具体病情及其意愿的基础上，为患者制定合理的诊疗计划。
     

孤立性肠系膜上动脉夹层介入治疗五例的护理体会

【摘要】 目的 探讨裸支架腔内血管重建术治疗孤立性肠系膜上动脉夹层（ＳＭＡＤ）的围手术期护理。方法 对采用裸支架载瘤动脉腔内血管重建术治疗孤立性的５例患者，予完善的术前准备，针对性的术后观察、护理。结果 在围手术期精心护理下，４例腹痛症状患者术后３周腹痛消失；５例患者介入治疗均获得成功，术后无并发症发生，随访３至１２个月效果满意。结论 术前充分准备，术后细致观察、护理，为孤立性ＳＭＡＤ介入治疗提供有价值的护理经验。
     

综合性放射防护措施在介入治疗防护中的应用

【摘要】 目的 探讨综合性放射防护措施在介入治疗防护中的应用价值。方法 在８４例介入手术治疗中联合应用床下铅橡胶帘、铅玻璃防护屏、铅防护服、铅围脖、铅眼镜及距离等对介入操作人员进行综合性防护。利用ＦＪ?鄄２０００个人剂量仪监测Ｘ射线辐射剂量，并对相关数据进行统计分析。结果 床下铅橡胶帘防护效率为９３．４％；铅玻璃防护屏防护效率为９３．５％；铅防护服防护效率为８８．４％；这些放射防护器材前后Ｘ线辐射剂量差异均具有统计学意义（Ｐ ＜ ０．０１）。距球管１ ｍ处 Ｘ线衰减量为５８．６％，距球管３ ｍ处的Ｘ线衰减量为８６．４％。１ ｍ与２ ｍ之间，２ ｍ与３ ｍ之间的辐射剂量差异均具有统计学意义（Ｐ ＜ ０．０１）。结论 综合性防护措施在介入操作中可有效降低Ｘ射线辐射、减少对介入操作人员身体危害。
     

锁骨下动脉闭塞机械再通的方法研究

目的研究锁骨下动脉闭塞血管内机械再通方法和疗效。方法选择３２例症状性锁骨下动脉闭塞患者行血管内机械再通治疗，观察再通率及疗效。结果３２例锁骨下动脉闭塞患者中，用不同方法成功完成血管内机械再通后行血管内支架成形术，术后全部患者后循环缺血症状和上肢缺血症状明显改善。结论采用适当方法行机械再通治疗锁骨下动脉闭塞安全、可行。     

应用覆膜支架介入救治颈动脉破裂并假性动脉瘤

目的探讨应用覆膜支架介入治疗颈动脉破裂并假性动脉瘤.方法4例肿瘤所致颈动脉破裂并假性动脉瘤形成的患者,均出现颈部或口腔危及生命的出血,采用Seldinger方法,选用自膨式聚四氟乙烯覆膜支架治疗.结果4例成功施行血管内介入治疗,其中颈总动脉中段1例,颈动脉球2例,颈总动脉远段1例.共置入覆膜支架6枚.术后假性动脉瘤腔被隔绝,颈动脉通畅,患者的临床症状明显改善,无神经功能障碍.1例患者11 d后支架下缘颈总动脉与原瘤腔相通,再次置入覆膜支架,2个月的随访无再出血.1例患者经钢圈栓塞、放置覆膜支架及裸支架瘤腔     

鼻肠减压管插入技术及其在小肠梗阻治疗中的应用

目的探讨鼻肠减压管插入技术及在治疗小肠梗阻中的作用。方法作为主要治疗方法或术前胃肠道减压术在１０例急性小肠梗阻患者中实施了鼻肠减压管插入治疗。治疗在X线透视下实施,鼻肠减压导管经一侧鼻孔插入,在患者体位的配合和配套导丝的引导下,将鼻肠减压管插入至十二指肠屈氏韧带附近或更远处的小肠。结果全部病例鼻肠减压管均顺利通过幽门插入预定位置,平均操作时间１６min（１０～３５min）,经导管治疗后所有患者腹痛、腹胀、呕吐等症状均有不同程度缓解,其中４例（单纯性肠粘连）症状完全消失,２周后拔除导管;３例患者转手术治疗;３例放弃进一步治疗。在插管过程中未出现消化道出血、穿孔等与操作相关的并发症。结论在X线透视下鼻肠减压管插入相对简单,耗时短,在手术前的胃肠减压和治疗单纯粘连性肠梗阻的作用上效果明显,值得采用     

经皮血管内支架治疗锁骨下动脉狭窄性疾病

目的探讨应用血管内支架治疗锁骨下动脉狭窄或闭塞性疾病的疗效。方法回顾分析１０例１１支锁骨下动脉狭窄或闭塞病变行血管内介入治疗的临床资料。结果１０例８支锁骨下动脉狭窄病变（狭窄率大于７０％）成功置入支架,３支闭塞锁骨下动脉中１支成功置入支架,２支闭塞锁骨下动脉未能开通。７例经股动脉置入支架,１例经肱动脉逆行置入支架。锁骨下动脉支架成功置入后肱动脉及桡动脉搏动良好,伴有盗血现象的５例患者症状消失。随访２～２４个月发现１例锁骨下动脉支架置入后９个月近年来血管腔内技术发展迅速,已成为动脉狭窄和闭塞性疾病的重要治疗手段之一。锁骨下动脉狭窄或闭塞是常见的阻塞性颅外脑血管病,不仅可引起上肢缺血症状,若闭塞发生在锁骨下动脉近端,可致同侧椎动脉血流逆流至锁骨下动脉远端供应患侧上肢,引起椎－基底动脉供血不足症状,谓锁骨下动脉盗血综合征（subclavian steal syndrome ,SSS）。为探讨应用血管内支架治疗锁骨下动脉狭窄或闭塞性疾病的疗效,我院于２００４年６月至２００７年４月对１０例锁骨下动脉狭窄或闭塞患者进行了治疗,现报道如下。１材料与方法１．１材料１．１．１临床资料本组１０例患者中男９例,女１例。年龄４５～７５岁,平均６６岁。单纯左锁骨下动脉病变７例（闭塞３例,狭窄４例）,单纯右锁骨下动脉狭窄２例,双锁骨下动脉狭窄１例。９例患者患肢动脉压比对侧低２０mmHg 以上,１例患者双侧锁骨下动脉狭窄无明显血压差。８例上肢有感觉异常伴脉搏减弱或无脉,７例有长期头晕病史,５例经颅多普勒超声检查（TCD）显示有椎动脉逆流。临床诊断动脉硬化９例,病理诊断大动脉炎１例。１例合并右肾动脉闭塞,１例合并对侧椎动脉重度狭窄,２例合并一侧颈内动脉重度狭窄。１．１．２使用材料与设备本组选择３种类型的镍钛合金自膨支架,有Protege（EV３,美国）７枚,Precise RX（Cordis,美国）１枚,Maris（Invatec,意大利）１枚。直径８～１０mm,长度４～６cm。使用血管造影设备为西门子AXIOM ARTIS FA DSA系统。１．２介入方法１．２．１术前血管造影采用Seldinger技术行股动脉穿刺,置入５F导管鞘。用５F猪尾导管、猎人头管、西蒙管或单弯管行主动脉弓及全脑DSA,明确病变血管的部位、形态、范围、侧支循环及其他脑血管供血情况,测量血管狭窄或闭塞的程度与长度,以便制订手术方案,选择合适的血管支架。对盗血患者行椎动脉造影时可观察到整个盗血过程１．２．２血管内支架成形术采用Seldinger技术行股动脉穿刺,置入８F导管鞘。将８F导引管与“y”阀、三通、压力盐水袋连接并排气,在黑泥鳅加硬交换导丝引导下,将导引管置于病变锁骨下动脉近端,送入导丝并越过狭窄段至远端,选择直径８mm、长４cm球囊（Cordis,美国）沿导丝送入狭窄段,用压力泵在６～１２atm下扩张１～２次,每次３０s左右,间隔１～２min。撤出球囊导管,将支架递送系统再狭窄,后再置入１枚支架,血管开通良好。１例患者双侧锁骨下动脉狭窄同时置入２枚支架后２个月突发脑出血死亡。结论应用血管内支架治疗锁骨下动脉狭窄或闭塞是一种微创、安全、有效的治疗方法,有望成为主要的治疗手段